With less than two weeks before “Everybody Pray for Hitchens Day,” cancer-stricken Christopher Hitchens is encouraging believers to hold off on praying for him. “I don’t mean to be churlish about any kind intentions, but when September 20 comes, please do not trouble deaf heaven with your bootless cries,” the atheist author wrote in a first-person article for Vanity Fair’s October 2010 issue. “Unless, of course, it makes you feel better,” he added, echoing a past comment. Last month, in an interview with CNN’s Anderson Cooper, Hitchens said he was well aware of the prayer groups that have formed since...